Blowpipe-lamp.



Nrran TATES JOHANN HEINZ, OF PFORZHEIM, GERMANY.

BLOWPIPEf-LAM P.

SPECIFICATION forming part of -Iietters Patent No. 646,171, dated March27, 1900.

Application filed October 1'7, 1899. Serial No. 733,905. (No model.)

To all whom iz',- may concern:

Be it known that I, JOHANN HEINZ, manufacturer, a subject of the GrandDuke of Baden,residing at No. 12 Kaiser Friedrich street, Pforzheim,Grand Duchyv of Baden, German Empire, have invented certain new anduseful Improvements in Blowpipe-Lamps, of which the following is aspeciiication.

This invention relates to an improved con# struction of blowpipe-lampsin which the ame is automatically regulated by the air-pressure in theblowpipe. l

In blowpipelamps as heretofore constructed the supply-valve for thecombustible gas has been actuated by the expansion of an accordion-likevessel contained in the lamp-casing, which vessel in expanding actuatesa loaded elbow-lever connected to the valve. According to the presentinvention the air under pressure in the blowpipe acts directly upon apiston or the like, which in moving raises or lowers the valve-cone in acorresponding manner.

In order to make my invention more clear, I refer to the accompanyingdrawings, in which similar letters denote similar parts throughout theseveral views, and inlwhich- Figure 1 is a vertical section through oneform of construction of my improved lamp, the valve being closed. Fig. 2shows the same section as Fig. 1, with the valve opened by thevair-pressure; Fig. 1a, a vertical central section at right angles to theplane of section of Fig. 1.

The soldering-blowpipe a, Fig. 17 has, as usual, a branch pipe b, whichis connected by a flexible tube c with the soldering-lamp. l

By the supply of air-pressure an invertedcup-shaped piston f, situatedin a cylinder f, is more or less raised,according to the strengthof theair-pressure, such as to the position shown at Fig. 2, the conical valveg, which is` connected to fby a rod, being at the same time raised. Onthe air-pressure diminishing the' piston f and valve g sinlrby their ownweight and the valve shuts off the gas-supply. A channel a serves forcarrying off the air when the piston fhas sunk so that the valvegcloses. The cup-shaped piston serves, among other things, to steady theadvance and return of the piston, which is very important for the over,where the same is made of thin elastic material, as shown, the expansiveforce of the air serves to automatically pack the same against the wallsof the cylinder, thereby preventing leakage of air.

For the purpose of arresting any moisture which may be carried along bythe air-blast, such as saliva and the like, I arrange at a suitablepoint along the passage of-the blast a moisture-trap y, which in thepresent case consistsof a bulb y', arranged below theblastpipe c', andwhich is preferably lledwith absorbent and in some cases dehydratingmaterial y2, such as wadding or other fibrous material. The blast-pipec' is divided at this point by a diaphragm c2, which dips down almost tothe bottom of the bulb y', thereby diverting the blast downward throughthe absorbent or dehydrating material, thereby com-I pellin g the sameto discharge its moisture before proceeding toward the flame. Moreover,the blast-pipe c at its discharge-orifice c2, where it enters thecylinder f', is provided with a funnel having an upset or inwardturnededge or rim which supplements the moisture-'trap and checks the passageof any slight moisture that may have escaped the latter. In someinstances the trap y may be dispensed with and in others the funnel t;but they are preferably used together. Either or both serve as amoisture-arrester, according to the conditions under which the apparatusis employed. The funnel t, with inward-turned edge kunderneath thepiston f, also serves for the same purpose. For protecting the interiorof the lamp against dust there is inserted in the cup-shaped nozzle p aperforated cup fr, provided with gas orifices or jets The combustiblegas enters through the channel s, and the dotted by-pass pipe Z, Fig. 1,serves, as usual, for the supply of a constantly-burningigniting-flame.Adiskd,arrangedwithin the lamp, serves as a guide for the stem of theconical valve g and also regulates the gasdischarge by causing the saidgas to issue in a series of fine jets, whereby pulsations and suddenpuffs are effectually avoided.

Having now described my invention, what I desire to secure by LettersPatent of the United States is- 1. In a blowpipe-lamp, a gas-controllingclosure and opening of the gasvalve. More- 1 valve in combination with ablast-pipe, a cylinder communicating with the blast-pipe, a pistonarranged to reciprocate within said cylinder, and means between thepiston and the Valve comprising a longitudinal connecting-rod secured tothe piston, whereby the movement of the former actnates the latter.

2. In a blowpipe-lamp, a gas-controlling valve in combination with theblast-pipe, a cylinder communicating with the blast-pipe, a cup-shapedpiston Within said cylinder and a longitudinal rod connecting the pistonwith the valve.

3. In a blowpipe-lamp, a gas-controlling valve in combination with ablast-pipe, a cylinder communicating with the blast-pipe, a pistonwithin said cylinder, a longitudinal rod connecting the piston with theValve, and a funnel with inward-turned flanges at its month, forming theexit of the blast-pipe and arranged below the piston.

4f. In a blowpipe-lamp, a gas-controlling valve and a blast-pi pe foractuating the same in combination with a moisture-trap consisting of abulb eonnnunicating with the blastpipe and a diaphragm dividing theblast-pipe and extending entirely across the same and from the topthereof to a point near the bottom of the bulb.

5. In a blowpipe-lanip, a gaS-controlling valve, and a blast-pipe foractuating the same in combination with a bulb filled withmoisture-absorbent material, and a diaphragm dividing the blast-pipe andextending to a point near the bottom of the bulb.

G. In a blowpipe-lamp, a gas-controlling Valve, and a blast-pipe foractuating the saine in combination with a moisture-trap arranged on theblast-pipe, an air-cylinder connected with the blast-pipe and a pistonwithin the same and a fu nnel with inward-turned flanges at its mouthforming an exit of the blast-pipe and arranged below the cylinder.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

JOHANN HEINZ.

\Vi tn esses:

J. ADRIAN, KARL FUCHS.

